|United States Patent||6,018,651|
|Bruckert , et al.||January 25, 2000|
A radio subscriber unit (102) comprises a controller (108) and a switched antenna diversity receiver apparatus (106) including a first antenna (114), a second antenna (116) and a receiver (126). The first antenna (114) is adapted to receive a first representation (158) of a radio frequency (RF) signal (156). The second antenna (116) is adapted to receive a second representation (160) of the RF signal (156). The receiver (126), selectively coupled to the first antenna (114) and the second antenna (116), generates a received signal (153) responsive to receiving at least one of the first representation (158) of the RF signal (156) from the first antenna (114) and the second representation (160) of the RF signal (156) from the second antenna (116). The controller (108), coupled to the receiver (126), selectively couples to the receiver (126), responsive to the received signal (153), one of: only the first antenna (114), only the second antenna (116) and both the first antenna (114) and the second antenna (116).
|Inventors:||Bruckert; Eugene J. (Arlington Heights, IL), Vilmur; Richard Joseph (Palatine, IL), Rich; Randall Wayne (Lake Villa, IL)|
|Filed:||November 29, 1995|
|Current U.S. Class:||455/277.1 ; 375/347; 455/277.2; 455/65|
|Current International Class:||H04B 7/08 (20060101); H04B 007/08 ()|
|Field of Search:||455/67.3,133,134,135,137,138,226.1,226.2,226.3,273,272,277.1,277.2,504-506,63 375/267,347,200,206,348 333/101,103,104,124,125,128 370/320,332,342,252|
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|5203023||April 1993||Saito et al.|
|5414734||May 1995||Marchetto et al.|
|5430769||July 1995||Patsiokas et al.|
|5642377||June 1997||Chung et al.|
TR 45, Mobil Station--Base Station Compatibility, Standard for Dual-Mode Wideband, Spread Spectrum Cellular System, PN-3118, Feb. 11, 1993, pp. i-xxxiv. .
Performance of a Two-Branch Radiotelephone Selection Diversity Receiver by Bruce C. Eastmond and James a. Pautler, Motorola, Inc. Chicago Corp. R & D Center, pp. 164-171. .
On The Opptimization Of Simple Switch Diversity Receivers by Mario A. Blanco of the IL Inst. of Tech., and Kenneth Zdunck of Motorola Communication Division, Schaumberg, IL..